Please note: Sites must be reserved two weeks in advance and any unreserved spots are then available on a first-come first-serve basis.
This entire one-acre island is a designated Cascadia Marine Trail campsite and is a great site for watching the sunset. It is also a popular stop for lunch with tour groups. Don’t go expecting solitude! The two designated Cascadia Marine Trail campsites are close together and not far from the composting toilet.
Approach: South sandy spit size varies with tides and is best access to the island.
Location: Posey Island is off the north-western corner of San Juan Island about a mile from Roche Harbor.
Sites: 2 sites. Only stay in 1 of the 2 group areas; max of 16 allowed on island per night. This is enforced.
Sanitation: Composting vault toilet
Fires: Fire rings available
Extras: 2 picnic tables
Fees: Reserve Online
Special Considerations: Sites must be reserved two weeks in advance and any unreserved spots are then available on a first-come first-serve basis. Reservations are necessary for camping.
Natural History: Posey Island is flat and sandy, covered with beach grass, brush and a few small scrubby trees, making for a picturesque beach scene. During the summer, the island can be covered with wildflowers. Historically, the spot was a destination for people wanting to picnic and pick bouquets, or “posies.” The island was originally thought to be a part of Pearl Island, and was called Spit Point. Local people, however, knowing better, called it Posey Island. The name stuck and has now been adopted for wider use.
Max Nights: 1